A horizontal window consisting of a large square fixed central pane with narrow vertical sliding sashes on either side, typically the full width of the bay, as in the Carson Pirie & Scott store by Louis Sullivan.
A window in the shape of a full circle, often with decorative elements, and arranged in a radial manner.
A rounded bay window that projects from the face of a wall; also a window having a rounded semicircular member at its head.
Two closely spaced windows which form a pair.
A dormer window.
A vertical window that projects from a sloping roof, placed in a small gable.
double lancet window
A window having mullions shaped to form two lancet windows that are side by side; found in Carpenter Gothic, Collegiate Gothic, and Tudor Revival styles.
Two windows, side by side, which form a single architectural unit.
A window having two vertically sliding sashes, each closing a different part of the window; the weight of each sash is counterbalanced for ease of opening and closing.
A bottom-hinged, inward-opening sash located in the window of an eyebrow dormer.
The representation of a window that is inserted in a facade to complete a series of windows or to give the appearance of symmetry.
One of a pair of casements, with rabbeted meeting stiles, which is hung in a single frame without a mullion and hinged together so that it can open and fold in a confined space.
A large plate-glass window in a commercial building with an operable window on each side to provide ventilation; because of its large size, it provided greater natural illumination than earlier windows. Widely used in high buildings in Chicago in the late 19th century.